Jokey Okey Dokey

One day, a duck walked into a store and asked the manager if they sold nails. The manager said," No, we do not sell nails.". The next day, the duck walked into the store and asked the manager if they sold nails, the manager said, " NO, we do not sell nails!" The third day the duck went into the store and asked the manager if they sell nails. The manager said, " NO, WE DON'T SELL NAILS AND IF YOU EVER ASK AGAIN, I'LL NAIL YOUR DUCK BEAK TO THE FLOOR!!!" The duck said, " Do you sell nails?"